Document Detail

Increased responsiveness in feeding behaviour of Caenorhabditis elegans after experimental coevolution with its microparasite Bacillus thuringiensis.
MedLine Citation:
PMID:  21880622     Owner:  NLM     Status:  MEDLINE    
Immune responses, either constitutive or induced, are costly. An alternative defence strategy may be based on behavioural responses. For example, avoidance behaviour reduces contact with pathogens and thus the risk of infection as well as the requirement of immune system activation. Similarly, if pathogens are taken up orally, preferential feeding of pathogen-free food may be advantageous. Behavioural defences have been found in many animals, including the nematode Caenorhabditis elegans. We here tested nematodes from a laboratory based evolution experiment which had either coevolved with their microparasite Bacillus thuringiensis (BT) or evolved under control conditions. After 48 generations, coevolved populations were more sensitive to food conditions: in comparison with the controls, they reduced feeding activity in the presence of pathogenic BT strains while at the same time increasing it in the presence of non-pathogenic strains. We conclude that host-parasite coevolution can drive changes in the behavioural responsiveness to bacterial microbes, potentially leading to an increased defence against pathogens.
Rebecca D Schulte; Barbara Hasert; Carsten Makus; Nico K Michiels; Hinrich Schulenburg
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2011-08-31
Journal Detail:
Title:  Biology letters     Volume:  8     ISSN:  1744-957X     ISO Abbreviation:  Biol. Lett.     Publication Date:  2012 Apr 
Date Detail:
Created Date:  2012-03-09     Completed Date:  2012-07-10     Revised Date:  2013-06-27    
Medline Journal Info:
Nlm Unique ID:  101247722     Medline TA:  Biol Lett     Country:  England    
Other Details:
Languages:  eng     Pagination:  234-6     Citation Subset:  IM    
Institute for Evolution and Biodiversity, University of Muenster, Muenster, Germany.
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MeSH Terms
Bacillus thuringiensis / physiology*
Biological Evolution*
Caenorhabditis elegans / genetics,  microbiology*,  physiology*
Feeding Behavior
Selection, Genetic

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